This power supply was featured in the December 1973 issue of Radio Electronics magazine. This type of circuit was used at the time to power tube televisions.
This circuit maintains on a flashing LED at a frequency determined by the capacitor. The...
We got this circuit in an old publication from 1978. The circuit uses a phototransistor and an...
This simple LDO, or low voltage drop regulator was found in an Electronic Design from the 90s. The...